CVE-2026-15508 Helicone CVE debrief

Who should care

Users of Helicone ai-gateway up to 0.2.0-beta.30 should be aware of this server-side request forgery vulnerability. This vulnerability can be exploited remotely, and the exploit has been published. Affected operators, platforms, vulnerability-management, and security teams should review the vulnerability and implement necessary mitigations.

Technical summary

The vulnerability is caused by a flaw in the build_target_url function of the ai-gateway/src/dispatcher/service.rs file in the AWS Metadata Service component of Helicone ai-gateway up to 0.2.0-beta.30. The vulnerability can be triggered by manipulating the extracted_path_and_query argument, leading to server-side request forgery. The CVSS score is 2.1, and the severity is LOW. Affected operators, platforms, vulnerability-management, and security teams should review the vulnerability and implement necessary mitigations. Users of Helicone ai-gateway up to 0.2.0-beta.30 should be aware of this server-side request forgery vulnerability and verify the version in use.

Defensive priority

Low priority. Monitor for potential exploitation attempts. Implement compensating controls, such as monitoring and exception tracking. Consider using a web application firewall to detect and prevent exploitation attempts. Inventory and verify the version of Helicone ai-gateway in use. Apply vendor remediation if available. Track exceptions, retest remediated assets, and close the item only after evidence is documented. Review relevant monitoring, detection, and logs for exposed assets that need extra review. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Review compensating controls for exposed systems while remediation is scheduled and verified. Check relevant monitoring, detection, and logs for exposed assets that need extra review. Track exceptions, retest remediated assets, and close the item only after evidence is documented. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Review compensating controls for exposed systems while remediation is scheduled and verified. Check relevant monitoring, detection, and logs for exposed assets that need extra review. Track exceptions, retest remediated assets, and close the item only after evidence is documented. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Review compensating controls for exposed systems while remediation is scheduled and verified. Check relevant monitoring, detection, and logs for exposed assets that need extra review. Track exceptions, retest remediated assets, and close the item only after evidence is documented. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Review compensating controls for exposed systems while remediation is scheduled and 7

Recommended defensive actions

• Inventory and verify the version of Helicone ai-gateway in use.
• Apply vendor remediation if available.
• Implement compensating controls, such as monitoring and exception tracking.
• Consider using a web application firewall to detect and prevent exploitation attempts.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Evidence notes

The CVE record was published on 2026-07-12T23:16:36.780Z and has not been modified since then. The NVD entry is currently Received. The vulnerability has been publicly disclosed, and the exploit has been published. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity. The vendor was contacted early about this disclosure but did not respond in any way.

Official resources